Kate Hudson is opening up about baby daddy Matt Bellamy, her surprise pregnancy and whether or not the Muse frontman is "the one".

Hudson says that right away she knew things were going to be serious between her and the rocker.

"In the beginning I felt like, okay, this is going to be heavy. Am I prepared for this? Because it had been a while, and I wasn't looking for that," the actress told InStyle. "But I just couldn't stay away. I wanted to talk to him and be with him all the time. On our first dates we would take long walks and talk the entire day."

As for her surprise pregnancy, Kate says, "Well, it wasn't like we didn't know what we were doing. There were no ovulation kits involved. We were tempting fate, and it worked."

Hudson, who thinks she's having a girl, says, "I didn't think I was going to have another kid until I was maybe 33 â€“ that was in the back of my mind before I met Matthew. But we were so in love when it happened, it was just so exciting for both of us."

Kate also revealed how the two of them met -- check it out ... after the jump!

The couple were "watching Radiohead's Thom Yorke with a guy I knew from high school, who introduced me to Matthew. We realized we had met a few years earlier, in Australia. Then I got distracted and said, 'I've got to find my friends; I don't know where they went.' He just looked at me and said, 'Come on, I'll take care of you.' That's when I went, 'Wait a minute, who are you?'"

She goes on to say, "Matthew was polite and immediately protective, which for somebody like me who's all over the place â€“ one minute I'm over here and the next I'm over there â€“ is important. He is just an amazing person."